Literature DB >> 25133875

A jogged dislocation governed strengthening mechanism in nanotwinned metals.

Haofei Zhou1, Xiaoyan Li, Shaoxing Qu, Wei Yang, Huajian Gao.   

Abstract

Atomistic simulations reveal a new and unique strengthening mechanism in nanotwinned metals governed by the collective motion of multiple necklace-like extended jogged dislocations. This mechanism prevails in a columnar-grained nanotwinned metal subject to an external stress parallel to the twin planes, provided the twin boundary spacing falls below a critical value. A theoretical model based on the depinning of unit jogs on twin planes is proposed to determine the flow stress associated with this deformation mechanism and is shown to be in agreement with atomistic simulations.

Entities:  

Keywords:  Jogged dislocation; atomistic simulation; plastic deformation; threading dislocation; twin boundary

Year:  2014        PMID： 25133875     DOI： 10.1021/nl501755q

Source DB:  PubMed          Journal:  Nano Lett        ISSN： 1530-6984            Impact factor:   11.189


  10 in total

1.  History-independent cyclic response of nanotwinned metals.

Authors:  Qingsong Pan; Haofei Zhou; Qiuhong Lu; Huajian Gao; Lei Lu
Journal:  Nature       Date:  2017-10-30       Impact factor: 49.962

2.  Transition of dislocation nucleation induced by local stress concentration in nanotwinned copper.

Authors:  N Lu; K Du; L Lu; H Q Ye
Journal:  Nat Commun       Date:  2015-07-16       Impact factor: 14.919

3.  Deformation twinning evolution from a single crystal in a face-centered-cubic ternary alloy.

Authors:  Zhenyu Zhang; Song Yang; Dongming Guo; Boya Yuan; Xiaoguang Guo; Bi Zhang; Yanxia Huo
Journal:  Sci Rep       Date:  2015-06-10       Impact factor: 4.379

4.  Twin Boundaries merely as Intrinsically Kinematic Barriers for Screw Dislocation Motion in FCC Metals.

Authors:  Jiayong Zhang; Hongwu Zhang; Hongfei Ye; Yonggang Zheng
Journal:  Sci Rep       Date:  2016-03-10       Impact factor: 4.379

5.  In-plane anisotropy and twin boundary effects in vanadium nitride under nanoindentation.

Authors:  Tao Fu; Xianghe Peng; Cheng Huang; Henggao Xiang; Shayuan Weng; Zhongchang Wang; Ning Hu
Journal:  Sci Rep       Date:  2017-07-06       Impact factor: 4.379

6.  In situ atomic-scale observation of grain size and twin thickness effect limit in twin-structural nanocrystalline platinum.

Authors:  Lihua Wang; Kui Du; Chengpeng Yang; Jiao Teng; Libo Fu; Yizhong Guo; Ze Zhang; Xiaodong Han
Journal:  Nat Commun       Date:  2020-03-03       Impact factor: 14.919

7.  Unraveling the origin of extra strengthening in gradient nanotwinned metals.

Authors:  Zhao Cheng; Linfeng Bu; Yin Zhang; HengAn Wu; Ting Zhu; Huajian Gao; Lei Lu
Journal:  Proc Natl Acad Sci U S A       Date:  2022-01-18       Impact factor: 12.779

8.  Revealing extreme twin-boundary shear deformability in metallic nanocrystals.

Authors:  Qi Zhu; Lingyi Kong; Haiming Lu; Qishan Huang; Yingbin Chen; Yue Liu; Wei Yang; Ze Zhang; Frederic Sansoz; Haofei Zhou; Jiangwei Wang
Journal:  Sci Adv       Date:  2021-09-01       Impact factor: 14.136

9.  Phase Volume Fraction-Dependent Strengthening in a Nano-Laminated Dual-Phase High-Entropy Alloy.

Authors:  Cheng Huang; Yin Yao; Shaohua Chen
Journal:  ACS Omega       Date:  2022-08-18

10.  Rebuilding the Strain Hardening at a Large Strain in Twinned Au Nanowires.

Authors:  Jiapeng Sun; Jing Han; Zhenquan Yang; Huan Liu; Dan Song; Aibin Ma; Liang Fang
Journal:  Nanomaterials (Basel)       Date:  2018-10-18       Impact factor: 5.076
  10 in total

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